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The formula to determine the height of the rocket above the ground at any time during the rocket's flight is given by: h = 119t - 7t2 where t = the time, in seconds, that has elapsed since the rocket was launched, and h = the height, in meters, of the rocket above the ground at time t. The value of h was 0 when the rocket hit the ground. How many seconds after the rocket was launched did it hit the ground?
Cryogenic rocket engines are also called as hybrid rocket engines.
Consider the following statements regarding C.I. engine: 1. C.I. engines are more bulky than S.I. engines 2. C.I. engines are more efficient than S.I. engines 3. Lighter flywheels are required in C.I. engines Which of the above statements are correct?
In the following question, five statements are given followed by four conclusions I, II, III and IV. You have to consider the given statements to be true even, if they seem to be at variance with commonly known facts. Read all the conclusions and decide which of the following logically follows from the given statements disregarding the commonly known facts. Statements: Some Blue are Color. All Color are Sky. No Rocket is Sky. All Rocket are Space. No Space is Color. Conclusions: I. Some Sky being Space is a possibility. II. Some Blue are Sky. III. Some Color being Rocket is a possibility. IV. Some Blue being Rocket, Space, Sky and Color is a possibility.
Hybrid rocket engines are also called as ________ propellant rocket engines.
“C25” Indias first indigenously developed high thrust cryogenic rocket engine has successfully ground-tested by the ISRO for which rocket vehicle?
For pressurizing cryogenic propellant tanks, the amount of gas required is _________ compared to an equivalent tank containing a non-cryogenic propellant.
In cryogenic rocket engines use oxidizer as fuel.
Consider the following statements with regard to IC engines: 1. For best fuel economy of spark ignition engines, the fuel-air mixture should be lean 2. With supercharging, the specific consumption in compression ignition engines increases 3. With increase of load, knocking tendency in compression ignition engines increases Which of the above statements are correct?
Consider the following statements pertaining to supercharging of engines: 1. The power output for a given engine increases 2. The loss of power due to altitude is compensated 3. The increase in supercharging pressure decreases the tendency to detonate in spark ignition engines 4. The mechanical efficiency of supercharged engines is quite high compared to naturally aspirated engines Which of the above statements are correct?